Copyholder



June 12, 1923.

H. S. LEVY COPYHOLDER Filed July 14 1921 Patented June 12, 1923.

UNITED STATES COPYHOLDER.

Application file d July 14,

To all whom it may concern: 6

Be it known that I, HOWARD SPENCER LEVY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Copyholders, ofwhich the following is a specification.

My invention relates to an improved copy holder and has for its objects, first, to provide a copy board-constructed preferably of metal or other non-warping material; and second to afford facilities for properlyh0lding objects against the surface of the board whereby the usual tacks or pins employed for this purpose may be omitted. v

Briefly stated, the invention comprises a metallic copy holder provided with'a series of substantially parallel slots or guideways and yieldable clamping'memb'ers mounted in said guideways, whereby plates, drawings, prints or the like may be engaged and held against the surface of the copy holder while being photographed or otherwise exposed for reproduction purposes.

The invention is illustrated in the accompanying'drawing, in which i Fig. 1 is a front elevational view of my improved copy holder;

Fig. 2 is a substantially transverse sectional view taken on the lines 2-2 of Fig. 1.

Fig. 3 is a perspective view of one corner of the copy holder frame, showing one method of securing the ends of parallel bars to the end members.

Fig. 4 is a sectional view through the copy holder showing a slightly modified form of clamping means.

Referring to the drawing, 10 denotes the body or frame of the copy holder including a series of parallel bars 11 spaced apart from each other and connected at their opposite ends to cross bars 12. The spaces or slots between the parallel edges of the pieces 11 pro- [vide suitable guideways 13 to accommodate work engaging clamps 14. As shown in Fig. 2 of the drawing, the pieces 11 are composed of channel shaped members arranged side by side, but it will be understood that these pieces 11 may be of any suitable cross section.

The clamping member 14 comprises a flat steel spring 15 adapted to overlie the space or guideway 13 and to project over the face of each bar 11 adjacent the guideway to a point substantially midway of the Width of 1921. Seria1.No. 484,590.

the bar. An opening is provided in the centelof the spring-l5 to receive thestem 16 ofa .pin 17 which projects downwardly through the guideway 13 and through a washery18 overlying the adjacent under edges of the pieces 11. The portion of stem 16iprojecting beyond the washer 18 is threaded and receives a nut 19 adapted to be tightened against one end'of a cone shaped coil spring 20, surrounding the stem 16, the opposite end of which bears against. the washer 18.

With this construction more or less tension may be applied to the spring 20 by adjustmg the'nut 19, whereby the downward pull exerted against the flat spring 15 maybe varied to accommodate difierent thickness of work. When it is desired to'Y'adjust the clamping members along the guideways13, the 1161181011015 the springs 20 is released and the clamps may be moved so that the springs 15 will be capable of occupying any desired position within its operative range on the surface of the copy holder.

In the form of the clamp shown in Fig. 4,

the fiat spring 15 receives the threaded end of the pin 17 which inthis case is inverted and the head rests against the washer 18. Therefore, the difference in the construction of this form is in the position of the coil spring 20 which is located between the under side of the flat spring 15 and the upper face of the washer 18. This practically incloses the coil spring 20 between the parallel walls of the pieces 11. The upwardly projecting threaded portion of the stem 16 receives a small thumb nut 21 which when moved axially of the stem 16 and against the outer surface of the flat spring '15 will tend to yieldably hold the latter fiat against the face of the copy holder. With this construction the flexibility. of the spring '15 practically takes care of the various thicknesses encountered in the work, but it is also possible'to loosen the thumb nut 21 so as to permit the spring 20 to expand, whereby a greater or a lesser distance may be established between the face of the. nieces 11 d the under side of'the engaging spring 15.

The operation of the invention is as follows: The frame 10 is usually placed in upright position as shown in Fig. 1, and the work to be held is placed over the face of the parallel pieces 11. springs 20 having been. previously relieved The tens-ion of the the clamping members 14 are moved along the guideways 13 to a point adjacent the edges of the Work and the ends of the spring 15 raised to receive these edges. The end portions of the clamping springs 15 are then permitted to spring back against the work and the nut 19 tightened about the stem 16 whereupon the spring 15 Will be pulled downwardly against the surface of the work to securely hold the latter in position. It has been found desirable to bevel the ends of the flat springs 15 so that the finger nail or an instrument may be inserted beneath the ends to raise them away from the surface of the holder itself.

I claim:

1. A copy holder having substantially parallel guideways and yieldable clamping devices slidable in said guideways.

2. A copy holder having substantially parallel guideways, clamping devices slidable in said guideways, and tensioning means for said clamping devices.

3 A copy holder comprising a series of slidably mounted clamping devices provided with adjustable spring engaging fingers, and a frame having a series of substantially parallel openings therein adapted to receive said clamping devices so as to bring the spring fingers against the surface of the frame.

4:. A copy holder comprising parallel members spaced apart to provide guideways therein, clamping members slidably mounted in said guid'eways and including fiat engaging means spanning said guideways and projecting over the surface of the adjacent parallel members to a point substantially midway of their Width, and means for yieldably holding said flat engaging means against the surface of said parallel members,

5. A copy holder comprising a frame provided with substantially parallel guideways therein, fiat spring engaging members overlying said guideways and projecting beyond the opposite edges of said guidewaya a depending stem carried by said flat spring and provided with an adjustable nut at its free end, and a coil spring surrounding said stem and having one of its ends seated against said nut and the opposite end thereof seated against the under surface of said frame at each side of said guideways, Whereby said engaging members may be moved axially of said guideways and with respect to the surface of said frame.

signature.

HOWARD SPENCER LEVY. 

